Fillet Welding Positions Jun 2026

Before we start flipping angles, a quick refresher. A fillet weld is used to join two pieces of metal at right angles (usually creating a "T" or lap joint). It’s triangular in cross-section. Unlike a groove weld, which melts into the depth of the metal, a fillet weld sits on the surface, binding the two sides together.

Here, the axis of the weld is vertical. For most code work (AWS D1.1), "3F" implies welding . fillet welding positions

Today, we’re zooming in on the most common joint in the industry: the . Let’s break down the positions, the codes, and the techniques you need to master to conquer gravity every time. Before we start flipping angles, a quick refresher